IS428 AY2019-20T1 Assign Lee Cheng Leng Visualisation 1
VAST 2019 MC2: Citizen Science to the Rescue
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Contents
Dashboard 1: Overview of Radiation Levels in St. Himark
Component 1: Radiation Concentration Map
Purpose
- Shows the radiation concentration levels over time, with the radiation levels reflected from the mobile sensor data.
- Allows user to identify neighbourhoods with high radiation concentration
Description
- Mobile sensor data was chosen for this visualisation as it had higher coverage over the various St. Himark neighbourhoods
- Density map is useful in showing the radiation "hot spots" at a glance - if radiation levels are higher in the neighbourhood, the opacity and intensity of the spots will increase.
Component 2: Static Sensor Heatmap
Purpose
- Shows the radiation levels reported by the static sensors
- Provides data to identify the radiation levels at the more crucial areas of St. Himark, such as the nuclear plant.
Description
- Uses colour intensity to clearly indicate sensors which are reporting high radiation levels
- The size range is adjusted such that readings below 75 are the smallest in size. This is because it is found that the maximum acceptable background radiation level is 75cpm.
Interactive Visualisation Techniques Used
- Select: Hover
A tooltip is shown when the user hovers over the sensor reading, providing them information regarding when the radiation reading was taken, the value recorded for that reading, along with which sensor recorded the reading. This would provide the user with more information without cluttering the visualisation unnecessarily.
- Explore: Slider
A slider is used to select a time frame for which the user wishes to visualise the changes in radiation levels. This allows the user to take a closer look at time periods of interest.
For example, a user might want to exclude 6 April and 7 April from his analysis as there is little radiation over background detected for those two days in the simulation. This feature would then allow them to do so.
- Explore: Time Lapse
Pagination is used to visualise changes in the radiation levels over St. Himark over the simulation period. This gives the user a better visualisation and understanding of any patterns of change, allowing them to identify any trends which might indicate that a significant event has occurred.
By clicking on the "next" button, the visualisation will update automatically based on the set parameters of day and hour in the timestamp. This awards an hourly view of the radiation concentration.
